package com.itheima.edu.info.manager.controller;

import com.itheima.edu.info.manager.domain.Student;
import com.itheima.edu.info.manager.service.StudentService;

import java.util.Scanner;

public class StudentController {
    private StudentService studentService= new StudentService();
    private Scanner sc= new Scanner(System.in);
    public void start() {
        //开启学生管理系统
        Scanner sc = new Scanner(System.in);
        studentLoop:
        while (true) {
            //菜单搭建
            System.out.println("-------欢迎来到<学生>管理系统------");
            System.out.println("请输入您的选择: 1. 添加学生 2. 删除学生 3.修改学生 4.查看学生 5.退出");
            String choice = sc.next();
            switch (choice) {
                case "1":
                    //System.out.println("添加");
                    addStudent();
                    break;
                case "2":
                    //System.out.println("删除");
                    deleteStudentById();
                    break;
                case "3":
                    // System.out.println("修改");
                    updateStudent();
                    break;
                case "4":
                    // System.out.println("查询");
                    findAllStudent();
                    break;
                case "5":
                    System.out.println("感谢您使用学生管理系统,再见!");
                    break studentLoop;
                default:
                    System.out.println("您的输入有误,请重新输入");
                    break;
            }
        }
    }

    public void updateStudent() {
        String updateId;
        while (true){
            System.out.println("请输入您要修改的学生id");
            updateId = sc.next();
            boolean exists = studentService.isExists(updateId);
            if (!exists){
                System.out.println("您输入的id不存在请从新输入");
            }else {
                break;
            }
        }
        System.out.println("请输入学生姓名");
        String name = sc.next();
        System.out.println("请输入学生年年龄");
        String age = sc.next();
        System.out.println("请输入学生生日");
        String birthday= sc.next();
        Student newStu=new Student();
        newStu.setId(updateId);
        newStu.setName(name);
        newStu.setAge(age);
        newStu.setBirthday(birthday);
        studentService.updateStudent(updateId,newStu);
        System.out.println("修改成功");
    }

    public void deleteStudentById() {
        String delId;
        while (true){
            System.out.println("请输入您要删除的学生学号");
             delId = sc.next();
            boolean exists = studentService.isExists(delId);
            if (!exists){
                System.out.println("您输入的学生不存在");
            }else {
                break;
            }
        }
        studentService.deleteStudent(delId);
        System.out.println("删除成功");
    }

    public void findAllStudent() {
        Student[]stus=studentService.findAllStudent();
        if (stus==null){
            System.out.println("查无信息请添加后重试");
            return;
        }
        System.out.println("学号\t\t姓名\t年龄\t生日");
        for (int i = 0; i < stus.length; i++) {
            Student stu = stus[i];
            if (stu != null) {
                System.out.println(stu.getId() + "\t" + stu.getName() + "\t" + stu.getAge() + "\t\t" + stu.getBirthday());
            }
        }
    }

    public void addStudent() {
        String id;
        while (true){
            System.out.println("请输入学生学号");
             id = sc.next();
             boolean flag=studentService.isExists(id);
             if (flag){
                 System.out.println("学号已被占用");
             }else {
                 break;
             }
        }

        System.out.println("请输入学生姓名");
        String name = sc.next();
        System.out.println("请输入学生年年龄");
        String age = sc.next();
        System.out.println("请输入学生生日");
        String birthday= sc.next();
        Student stu= new Student();
        stu.setId(id);
        stu.setName(name);
        stu.setAge(age);
        stu.setBirthday(birthday);
        boolean result = studentService.addStudent(stu);
        if (result){
            System.out.println("添加成功");
        }else {
            System.out.println("添加失败");
        }
    }
}
